30 



x y y mycologia 



the pycnia and aecia being first noticed June 6. The third collec- 

 tion was sown May 19, on the same hosts, with infection only on 

 Pseudotsuga, numerous pycnia showing May 31, and equally 

 numerous aecia June 9. 



The aecia on Pseudotsuga were first brought to my attention 

 by Professor E. W. D. Holway, who sent a collection from 

 Beaver River valley, B. C, in 1907. This collection was described 

 by the writer, and named Caeoma occidentals 55 The following 

 year Mr. E. Bethel sent collections from Eldorado Springs, Colo., 

 and in 1909 he sent other collections from Eldorado Springs, and 

 also from Tolland and Golden. From observations made at these 

 places Mr. Bethel suggested that the connection between the 

 Caeoma on Pseudotsuga and the Melampsora on Populus was 

 unquestionable. The aecial stage is doubtless rather common 

 throughout the range, but it is so inconspicuous and evanescent 

 that it has been very little collected. 



Summary 



The following is a complete list of the successful cultures made 

 during the year 1910. It is divided into two series, species that 

 have previously been grown in cultures and reported by the writer 

 or other investigators, and species whose culture is now reported 

 for the first time. 



A: Species Previously Reported 



1. Puccinia GiossuMnae (Schuni.) Lagcrh. Teliospores from 

 Car ex tenuis Rudge and from C. pallescens L., sown on Ribes 

 Cynosbati L. 



2. Puccinia Peckii (DeT.) Kellerm. Teliospores from Carex 

 lanuginosa Michx., sown on Onagra biennis (L.) Scop., and from 

 C. trichocarpa Muhl., sown on O. biennis (L.) Scop, and Meriolix 

 serrulata (Nutt.) Walp. 



3. Puccinia Caricis-Solidaginis Arth. Teliospores from Carex 

 scoparia Schk., sown on Euthamia graminifolia (L.) Nutt. 



4. Puccinia Caricis- Aster is Arth. Teliospores from Carex 

 f estiva Dewey, sown on Aster adscendens Lindl. 



"Bull. Torrey Club 34: 591. 1907. 



